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Consolidated Balance Sheet Detail (Detail textual) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Construction in Progress, Gross	[1]	$ 12,906	$ 2,581
Depreciation		5,200	4,200	$ 3,300
Software Development [Member]
Construction in Progress, Gross			$ 2,100
Casting Machine [Member]
Construction in Progress, Gross				$ 2,100
Marlborough facility [Member]
Construction in Progress, Gross		$ 7,300
[1] Construction in progress as of December 31, 2018 includes $7.3 million for the buildout of our Marlborough facility, $2.1 million in capitalized internal-use software development costs and $2.1 million for a casting machine, among other projects.

X

- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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